Window lock



Sept. 18,1923, I Wm B. E. WASHBURN WINDOW LOCK Filed March 10, 1922 Patented Sept. 18, 1.9213.

BERT E. WASI-IBURN, OE PEQBIA, ILLINQIS.

wrnnow LOCK.

Application filed March 10, 1922 Serial. No. 542,550.

To all whom'z'zfi may concemt:

Be it known that 1, Bear E. lVAsHeURN, a citizen of the United States, and a resident of Peoria, in the county of Peoria and State of Illinois. have invented certain new and useful Improvements in Window Locks, of which the following is a full, clear, and exact description, referencebeing had to the accompanying drawing, forming part of this specification. v j

My invention relates primarily to devices which are attached to the sash and casings of windows whereby the sash may be locked either opened or closed.

One object of my invention is the provision of a mechanism which is entirely concealed from view and which will effectually lock the sash in any adjusted position.

Another object of my invention i to provide a structure which will prevent the sash from rattling in the frame.

Another object of my invention is the pro vision of means for adjusting the tension of the locking devices.

Other objects of my invention will appear and be described in the specification.

The novelty of my invention will be here inafter more fully set forth and specifically pointed out in the claim.

In the accompanying drawing:

Fig. 1 is a broken view of a typical win dow frame and sash, viewed from the inside of a room and showing all of my device that appears on the finished structure.

Fig. 2 is an enlarged broken sectional view of a portion of Fig. 1, showing the general arrangement of the parts.

Fig. 3, is a side View of Fig. h

Fig. 1, is an enlarged detail of the part of the mechanism shown in Fig. 2.

The same numerals of reference are used to indicate identical parts in all the figures.

Referring more particularly to Fig. 1, the ordinary window comprises a frame 1, stool 2, upper sash 8, and lower sash 4.

A key hole plate 5 is carriedby the frame 1 adjacent the meeting rails of the sash, this plate preferably being provided with two key holes.

As shown more clearly in Fig. 2, the lower sash 4: is plowed as at 6 to receive a species of rack bar 7, this bar being turned over as at 8 at the upper portion of the sash and similarly turned over at the lower portion so that the rack bar 7 is firmly held in'place against longitudinal movement. The upper sashB is similarly plowed and a similar rack bar inserted.

The locking mechanism is carried on a plate 9 which is secured to the jamb, the latter being mortised to receive the locking mechanism which. as shown more clearly in Fig. 4, comprises a gear 10 suitably mounted on bearings in the side pieces 11 and 12 and 13 which are angularly arranged and adapted to engage the teeth of rack bar 7. The racks 12 and 13 pass through the plate 9 'and are guided and held in mesh by the guides 14 and 15 which are carried by the side plates 11. Each of the racks 12 and 13 is provided with a lug 16 against which a compression spring 17, bears, the other end of the compression spring being engaged by a suitable washer 18 carried by the end of an adjusting screw 19 which passes through a portion of theguide 1 1 and 15 and by means of which the tension of springs 17 may be regulated as desired.

A spring, 20 is mounted adjacent to the gear 10, the latter carrying a projection 21 which is adapted to cooperate with the spring 20 to hold the parts in unlocked position.

Any suitable key may be employed to engage the allotted opening in gear 10 to rotate the latter in either direction to operate the device.

By arranging the racks 12 and 13 on an angle as shown, the device will lock the sash against movement in either direction and afford a plurality of contacts with the rack bar 7 thereby increasing the amount of resistance offered to a movement of the window sash when the device is locked.

It is to be noted that the locking mechanism for each sash is arranged adjacent that face of the sash which is toward the inside of the room so that the locking mechanism is placed as far from exposure to the weather as possible, and also that the locking mecha nism is placed so as not to interfere with the sash cord which is usually mounted at the center of the thickness of the sash.

As shown in Figs. 2 and 3, to prevent the sash weights from striking the locking mechanism a guard 22 is mounted in the weight box above the locking mechanism and if deired a similar guard may be placed below the locking mechanism so that the weights in ascending or descending will be guided in passing the locking mechanism to prevent contact therewith.

It will be observed that from the construction shown either sash may be locked in any position in the frame. 7 It is to be noted that the springs 17 may be adjusted through the medium of the screws 19 to force the racks '12 and 13 against the racks bar 7 to prevent the windoW from rattling by forcing the sash against the jamb opposite from-that which carrie the locking mechanism.

Having thus fully described my invention, I claim' Ina Window lock the combination of a rack bar movable relatively to locking mechmechanism and in the place of this movement, a'nd an adjustable spring tension device for causing the engagement of the locking members with the rack bar under sufficient tension to prevent the window fromrattling, rack teeth carried from eachlocking member, which gear engaging the rack teeth from moving the looking members, a

projection on the gear, and a spring operated device for engaging the projection to hold the parts'in unlocked position;

. BERT E; WASHBUBN. 

